Patents by Inventor Tomoko Aono

Tomoko Aono has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 12363292
    Abstract: In a video coding and decoding method, in a case that a transmission rate is low, image quality is deteriorated due to coding distortion, but the image quality can be improved owing to post-filter processing using a neural network. However, a problem is that there may be no method of defining a strength control value to be input in the post-filter processing. A video decoding apparatus according to an aspect of the present invention includes an image decoding apparatus that generates a decoded image, and a post-filter processing apparatus that performs post-filter processing on the decoded image. In accordance with an input format for luminance and chrominance of the decoded image to be input in the post-filter processing, a strength control value obtained in a process of generating the decoded image is transformed, and the post-filter processing is performed.
    Type: Grant
    Filed: January 16, 2024
    Date of Patent: July 15, 2025
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Takeshi Chujoh, Tomohiro Ikai, Yukinobu Yasugi, Tomoko Aono
  • Patent number: 12348707
    Abstract: Object Known derivation, in units of intra prediction modes, of a template-based intra prediction mode based on a difference between a template prediction image and a template image has a problem that derivation of the template image and cost calculation require great computational resources. Solution An image decoding apparatus includes an intra prediction image generation unit configured to generate a template prediction image for a prescribed intra prediction mode candidate, a template cost derivation unit configured to derive a cost from the template prediction image and a template image corresponding to an image near a target block, and an intra prediction image generation unit configured to generate an intra prediction image by using a selected intra prediction mode, and a reference sample is sampled that is used to generate the template prediction image.
    Type: Grant
    Filed: February 3, 2023
    Date of Patent: July 1, 2025
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tomoko Aono, Yukinobu Yasugi, Tomohiro Ikai, Zheming Fan
  • Publication number: 20250168405
    Abstract: Video coding and decoding apparatuses that can enhance coding efficiency are provided. A video decoding apparatus according to an aspect of the present invention includes a parameter decoder configured to decode a transform coefficient and a coefficient sign prediction error from coded data, and a sign prediction unit configured to predict a sign of the transform coefficient. The sign prediction unit derives a cost with reference to a boundary pixel with a neighboring block for a candidate of a combination of signs of transform coefficients without sign information, selects the sign, based on the cost, and modifies the predicted transform coefficient sign, using the coefficient sign prediction error decoded by the parameter decoder. The sign prediction unit divides the transform coefficients without the sign information into multiple groups, and performs the prediction on a transform coefficient of the transform coefficients for each of the multiple groups.
    Type: Application
    Filed: February 20, 2023
    Publication date: May 22, 2025
    Inventors: Tomonori HASHIMOTO, Tomohiro IKAI, Yukinobu YASUGI, Tomoko AONO
  • Patent number: 12289468
    Abstract: The amount of memory required for CCLM prediction is reduced. The CCLM prediction parameter derivation unit (310442) derives a scale shift value corresponding to a luma difference value, and derives a CCLM prediction parameter, by shifting, by using the scale shift value, a value obtained by multiplying a value of a table referred to with a value obtained by performing right shift of the luma difference value by the scale shift value as an index and a chroma difference value. In addition, in a case of deriving a prediction image, a bit width is reduced by adaptively deriving a shift amount of a linear prediction parameter from the chroma difference value.
    Type: Grant
    Filed: February 9, 2024
    Date of Patent: April 29, 2025
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yukinobu Yasugi, Eiichi Sasaki, Tomohiro Ikai, Tomoko Aono
  • Patent number: 12289471
    Abstract: An image decoding apparatus including a header decoder configured to decode, from coded data, a flag indicating whether dependent quantization is enabled and a flag prohibiting transform skip residual quantization, and a TU decoder configured to decode a transform coefficient in a TU block in an RRC mode in which a LAST position is coded, the LAST position corresponding to a decoding start position for the transform coefficient, or a TSRC mode in which the LAST position is not coded. The TU decoder performs dependent quantization in the RRC mode in a case that the transform coefficient for transform skip is decoded in the TSRC mode, and does not perform dependent quantization in the RRC mode in a case that the transform coefficient for transform skip is decoded in the RRC mode.
    Type: Grant
    Filed: January 29, 2024
    Date of Patent: April 29, 2025
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Tomonori Hashimoto, Eiichi Sasaki, Tomohiro Ikai, Tomoko Aono
  • Publication number: 20250119571
    Abstract: A load in processing of searching for a motion vector is reduced. In order to solve the problem described above, a motion vector derivation apparatus according to one aspect of the present invention that derives a motion vector to be referred to for generating a prediction image to be used for coding or decoding of a video includes a motion vector search unit configured to search for a motion vector on a prediction unit basis through matching processing. The motion vector search unit is configured to stop search of the motion vector, depending on whether or not a conditional expression according to a pixel bit-depth is satisfied.
    Type: Application
    Filed: December 11, 2024
    Publication date: April 10, 2025
    Inventors: Takeshi CHUJOH, Tomoko AONO, Tomohiro IKAI, Eiichi SASAKI, Yukinobu YASUGI
  • Publication number: 20250119580
    Abstract: A 3D data decoding apparatus for decoding encoded data includes a mesh prediction unit configured to derive a prediction position of a base mesh vertex position from the encoded data, and an arithmetic decoder configured to arithmetically decode a prediction residual. The arithmetic decoder decodes a part of a beginning of a prefix of an absolute value of a coefficient of the prediction residual by using a context and adds the prediction position and the prediction residual to derive the base mesh vertex position.
    Type: Application
    Filed: August 28, 2024
    Publication date: April 10, 2025
    Inventors: YASUAKI TOKUMO, Keiichiro TAKADA, TOMOHIRO IKAI, TAKESHI CHUJOH, TOMOKO AONO
  • Publication number: 20250104286
    Abstract: A 3D data decoding apparatus includes a geometry decoder configured to decode a geometry frame from encoded data, an attribute decoder configured to decode an attribute frame from the encoded data, a refinement information decoder configured to decode refinement characteristics information and refinement activation information from the encoded data, and a refinement processing unit configured to perform refinement processing on the attribute frame or the geometry frame according to the refinement characteristics information. The 3D data decoding apparatus further includes a syntax element indicating a number of refinements is decoded from the refinement activation information and an index indicating the refinement characteristics information for the decoded number of refinements is decoded.
    Type: Application
    Filed: September 12, 2024
    Publication date: March 27, 2025
    Inventors: Keiichiro TAKADA, Yasuaki TOKUMO, Tomohiro IKAI, Takeshi CHUJOH, Tomoko AONO
  • Publication number: 20250106441
    Abstract: A 3D data decoding apparatus for decoding encoded data includes an arithmetic decoder configured to arithmetically decode a mesh displacement from the encoded data. The arithmetic decoder decodes a part of a beginning of a prefix of a remainder of an absolute value of a coefficient of the mesh displacement by using a context.
    Type: Application
    Filed: August 29, 2024
    Publication date: March 27, 2025
    Inventors: YASUAKI TOKUMO, Keiichiro TAKADA, TOMOHIRO IKAI, TAKESHI CHUJOH, TOMOKO AONO
  • Publication number: 20250106426
    Abstract: A video decoding apparatus includes an image decoding apparatus configured to decode coded data and generate a decoded image, a supplemental enhancement processing apparatus configured to perform supplemental enhancement processing on the decoded image, and a supplemental enhancement information decoding apparatus configured to decode multiple pieces of supplemental enhancement information for causing the supplemental enhancement processing apparatus to operate. The multiple pieces of supplemental enhancement information includes a piece of supplemental enhancement information indicating a priority processing order of the multiple pieces of supplemental enhancement information. The piece of supplemental enhancement information includes information further indicates a change of a parameter of the decoded image to be input to the supplemental enhancement processing apparatus based on the priority processing order.
    Type: Application
    Filed: September 7, 2024
    Publication date: March 27, 2025
    Inventors: TAKESHI CHUJOH, TOMOHIRO IKAI, YUKINOBU YASUGI, TOMOKO AONO
  • Publication number: 20250097443
    Abstract: A problem with known SEI is that a relationship between a target image and an input tensor of a neural network model and a relationship between an output tensor and an output image are undefined or insufficient, and thus processing cannot be performed by simply using a model. Another problem is that in a case that the color component of the output image and the color component of the target image are different from each other, processing cannot be performed. An aspect of the present invention provides a video decoding apparatus including a prediction image derivation unit configured to decode a prediction image, and a residual decoder configured to decode a residual, wherein an input tensor is derived from a parameter indicating the number of channels of the input tensor and the output tensor of the neural network model or an image is derived from the output tensor.
    Type: Application
    Filed: January 11, 2023
    Publication date: March 20, 2025
    Inventors: Yukinobu YASUGI, Keiichiro TAKADA, Tomohiro IKAI, Takeshi CHUJOH, Tomoko AONO
  • Publication number: 20250080740
    Abstract: Provided is a video decoding apparatus for decoding coded data of a tile group in which a picture is split into rectangular regions, the tile group being composed of segments, the video decoding apparatus including: a header decoder configured to decode the number of tiles, a WPP enabled flag, and a slice enabled flag indicating whether segments in a target tile group are rectangular tiles, CTU rows, or slices from a tile group header, wherein the header decoder is configured to decode only one of the number of tiles being two or more, the WPP enabled flag being 1, and the slice enabled flag being 1 in one tile group.
    Type: Application
    Filed: November 21, 2024
    Publication date: March 6, 2025
    Inventors: Tomohiro IKAI, Tomoko AONO, Takeshi CHUJOH, Yukinobu YASUGI, Eiichi SASAKI
  • Patent number: 12238284
    Abstract: Complexity of coding/decoding of a video is reduced. An image decoding apparatus (31) includes a CN information decoder (10) configured to hierarchically split a coding node by at least any of binary tree split and ternary tree split. The CN information decoder refers to a method of splitting an immediately higher node, which is a node one generation higher than a target node, to restrict a method of splitting the target node.
    Type: Grant
    Filed: June 8, 2023
    Date of Patent: February 25, 2025
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yukinobu Yasugi, Tomoko Aono, Tomohiro Ikai
  • Publication number: 20250056047
    Abstract: A video coding/decoding apparatus that can enhance coding efficiency using non-separable transform is provided. A video decoding apparatus according to an aspect of the present invention includes a prediction image generation unit configured to generate a prediction image, and an inverse non-separable transform processing unit configured to perform inverse non-separable transform. The non-separable transform processing unit does not change a specific frequency component of a transform coefficient.
    Type: Application
    Filed: November 28, 2022
    Publication date: February 13, 2025
    Inventors: TOMOHIRO IKAI, TOMONORI HASHIMOTO, TOMOKO AONO
  • Patent number: 12219150
    Abstract: Object A video coding and decoding apparatus that can enhance coding efficiency is provided. Solution A video decoding apparatus includes an OOB determination unit configured to determine whether a reference block is a target of OOB processing by comparing coordinates of the reference block with coordinates of a picture, and an OOB mask derivation unit configured to derive mask data indicating whether a pixel is available by comparing coordinates of the pixel included in the reference block with the coordinates of the picture. The OOB determination unit determines whether the reference block is the target of the OOB processing based on presence or absence of processing to be applied to a reference picture including the reference block.
    Type: Grant
    Filed: February 2, 2023
    Date of Patent: February 4, 2025
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yukinobu Yasugi, Tomohiro Ikai, Tomoko Aono
  • Patent number: 12206888
    Abstract: A load in processing of searching for a motion vector is reduced. In order to solve the problem described above, a motion vector derivation apparatus according to one aspect of the present invention that derives a motion vector to be referred to for generating a prediction image to be used for coding or decoding of a video includes a motion vector search unit configured to search for a motion vector on a prediction unit basis through matching processing. The motion vector search unit is configured to stop search of the motion vector, depending on whether or not a conditional expression according to a pixel bit-depth is satisfied.
    Type: Grant
    Filed: April 14, 2023
    Date of Patent: January 21, 2025
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Takeshi Chujoh, Tomoko Aono, Tomohiro Ikai, Eiichi Sasaki, Yukinobu Yasugi
  • Patent number: 12206854
    Abstract: A 3D data decoding apparatus for decoding coded data. The 3D data decoding apparatus includes an arithmetic decoder configured to arithmetically decode mesh displacement from the coded data, a context selection unit configured to select a context in the arithmetic decoding, and a context initialization unit configured to set an initial value of the context. In the context initialization unit, a context initialization parameter for initializing the context is decoded from the coded data.
    Type: Grant
    Filed: March 3, 2023
    Date of Patent: January 21, 2025
    Assignee: SHARP KABUSHIKI KAISHA
    Inventors: Yasuaki Tokumo, Keiichiro Takada, Tomohiro Ikai, Takeshi Chujoh, Tomoko Aono
  • Publication number: 20250024078
    Abstract: Video coding and decoding apparatuses that can enhance coding efficiency are provided. A video decoding apparatus according to an aspect of the present invention is a video decoding apparatus including a parameter decoder configured to decode, from coded data, syntax (mts_idx) of a target block. The parameter decoder decodes mts_idx depending on a block size, a LAST position, and a non-zero coefficient position of the target block. The parameter decoder determines whether to decode mts_idx, using a threshold for the LAST position. The threshold is larger in a case that the block size is equal to or larger than a prescribed size than in a case that the block size is smaller than the prescribed size.
    Type: Application
    Filed: December 1, 2022
    Publication date: January 16, 2025
    Inventors: Tomonori HASHIMOTO, Tomohiro IKAI, Tomoko AONO
  • Publication number: 20250016371
    Abstract: An arithmetic coding scheme is provided for coding and decoding 3D data and improves coding efficiency for mesh displacements and high-quality coding, and decoding of the 3D data. A 3D data decoding apparatus is also provided for decoding coded data. The apparatus contains an arithmetic decoder that is configured to arithmetically decode a mesh displacement from the coded data. The arithmetic decoder decodes, from the coded data, a first flag indicating whether a coefficient of the mesh displacement has an absolute value greater than 0, a second flag indicating whether the coefficient has an absolute value greater than 1, and a third flag indicating whether the coefficient has an absolute value greater than 2.
    Type: Application
    Filed: February 22, 2024
    Publication date: January 9, 2025
    Inventors: YASUAKI TOKUMO, Keiichiro TAKADA, TOMOHIRO IKAI, TAKESHI CHUJOH, TOMOKO AONO
  • Publication number: 20250016306
    Abstract: A video decoding apparatus is a video decoding apparatus for deriving a prediction image by using a reference picture included in a reference picture list.
    Type: Application
    Filed: September 17, 2024
    Publication date: January 9, 2025
    Inventors: Takeshi CHUJOH, Tomohiro IKAI, Tomoko AONO, Eiichi SASAKI, Tomonori HASHIMOTO, Tianyang ZHOU, Yukinobu YASUGI